<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

    </style>
</head>
<body>

</body>
<script>
    console.time("test1")
    for(i=0;i<100000;i++){
        var newDiv=document.createElement("div");
        document.body.appendChild(newDiv);
    }
    console.timeEnd("test1")
</script>
</html>